Answer: Homologous chromosomes are chromosomes which contain the same genes in the same order along their chromosomal arms.
Explanation: I hope this helps.
Write this number in scientific notation: 1, 260, 000
Answer:
= 1.269 × 106
Explanation:
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Question: Which of the following is the most accurate when discussing the function
of nerve cells?
a) Adenosine diphosphate moves across the synapse to the postsynaptic
neuron
b) Acetylcholine triggers the release of calcium ions from the vesicles
c) The action potential moves in a wave-like fashion along the axon of
the neuron towards the axon terminal
d) Sodium and potassium ions contribute to an action potential
produced by nerve cells
The statement 'Sodium and potassium ions contribute to an action potential produced by nerve cells' is the most accurate when discussing the function of nerve cells (Option d).
What is the function of nerve cells?The function of nerve cells is associated with the entry and out of sodium and potassium ions across the plasma membrane, which generates differences in electrical charges between the cell and the surrounding medium.
In conclusion, the statement 'Sodium and potassium ions contribute to an action potential produced by nerve cells' is the most accurate when discussing the function of nerve cells (Option d).
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Question 2 of 10
Which part of the cell contains the instructions that ribosomes use to
assemble proteins?
O A. Cytoplasm
о B. Amino acid
O C. Mitochondrion
D. Nucleus
The part of the cell which contains the instructions that ribosomes use to assemble proteins is (D) nucleus.
Both prokaryotic as well as the eukaryotic cells has a nucleus, which is where the genetic material DNA is contained and which houses information about the entire structure of the organism.
The ribosomes are instructed by the DNA found in the nucleus to assemble the proteins that the cell needs to survive. These ribosomes construct complex proteins by building constituent parts in accordance with directions provided by the DNA. Translation is the term for the process by which proteins are created from DNA.
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What conditions are needed to form organic molecules from inorganic molecules
Answer:
Presence of inorganic molecules with lightning and intense radiation
Explanation:
This process of the formation of organic molecules from inorganic molecules is called abiogenesis. It is believed that this is how the first organic molecules were created in early earth about 3.8 billion years ago. The classic 1952 Miller–Urey experiment attempted to replicate the condition of the early earth. They replicated lightning strikes (using electric parks) in a glass with greenhouse gases believed to have been the major constituents of early earth's atmosphere like methane. They were able to form primitive organic molecules from this experiment.
If a plant cell is unable to do photosynthesis after being sprayed with a chemical, what
organelle did the chemical destroy?
O Mitochondria
O Chloroplast
O Vacuole
O Ribosome
Answer:
Mitochondria, because the mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions, such as photosynthesis.
Explanation:
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Which of the following uses carbon from glucose as both an electron donor and an electron acceptor?
anaerobic respiration
aerobic respiration
fermentation
A & B
B & C
Aerobic respiration and fermentation use carbon from glucose as both an electron donor and electron acceptor.
What is aerobic respiration?
The process of aerobic respiration, which takes place in the presence of oxygen and converts glucose into ATP (Adenosine Triphosphate), gives the cell energy.
The procedure includes several phases, such as glycolysis, acetyl coenzyme A synthesis, citric acid cycle, electron transport chain, etc.
Carbon dioxide, water, and ATP energy molecules are the byproducts of aerobic respiration. A chain of electron donors and acceptors is involved in the electron transfer process.
Therefore, Aerobic respiration and fermentation use carbon from glucose as both an electron donor and electron acceptor.
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Thomas is playing baseball with Matt. Thomas hits the 0.14 kg baseball and it moves with a velocity of 50 m/s. Assuming all energy is conserved, what is a height the ball can reach if his straight upward?
What can we find with mass and velocity?
If all energy is conserved, that means no energy is lost so KE will eventually equal GPE at the peak of the balls height what does this mean we can do?
We can find the momentum of the body using mass and velocity.
What is the momentum of a body?
Linear momentum, translational momentum, or simply momentum is the product of an object's mass and velocity in Newtonian physics. It is a vector quantity with magnitude and direction. If m is an object's mass and v is its velocity (also a vector quantity), then p = mv is the object's momentum.
We can find the momentum of the body using mass and velocity by the relation p = mv.
momentum, p = 0.14 x 50 kg m/s
= 7 kg m/s
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Which illustration best models the movement of
wind along the coast in the afternoon?
During warm summer afternoons, winds called sea breezes blow from cooler ocean to warmer land. It is driven by sunlight and solar heating.
What are prevailing winds?These are the winds that blow from a single direction over a specific area. Generally these winds blow from east to west rather than north and south because of earths rotation.
What are types of prevailing winds ?There are three types of prevailing winds:
Trade windsPrevailing westerliesPolar easterliesThe air over land in the coastal areas which heats up more faster during the day and begins to rise. Hence it results in low pressure at the surface. As warm air rises this air enters from sea. As a result wind direction during the day is from sea to land.
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If a DNA sample consists of 30% Thymine, what are the percentages of the other bases?
Adenine
Thymine
Cytosine
Guanine
If a DNA sample contains 66% Guanine, what percent of the other bases does it contain?
Adenine
Thymine
Cytosine
Guanine
If a DNA sample contains 48% Adenine, what are the percentages of the other bases?
Adenine
Thymine
Cytosine
Guanine
If a DNA sample consists of 92% Cytosine, what percent of the other bases does it contain?
Adenine
Thymine
Cytosine
Guanine
Answer:
The order of the bases on the opposite strand of DNA should be Thymine, Guanine, Guanine and Cytosine.
DNA and complementary base pairing
The deoxyribonucleic acid (DNA) is a double helix composed of two long chains of sequential nucleotides.
In DNA there are four classes of nucleotides, each containing one different nitrogenous base (i.e., Adenine, Guanine, Cytosine, Thymine).
According to the base pair rules of complementarity, Adenine always pairs with Thymine, whereas Guanine always pairs with Cytosine.
In conclusion, the order of the bases on the opposite strand of DNA should be Thymine, Guanine, Guanine and Cytosine.
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Below are the reduction half reactions for chemolithoautotrophic nitrification, where ammonia is a source of electrons and energy and oxygen is the terminal electron acceptor.
NO2- + 6e- -> NH4+ (+0.34 volts)
O2 + 4e- -> 2H2O (+0.82 volts)
Using the information given, calculate the ΔE for this reaction, balance the full reaction to determine the n, the number of electrons transferred when 193 moles of NH4+ are oxidized. Finally, use the simplified Nernst Equation
ΔG = -nFΔE, where F = 96.5 kJ (mol e- × V)-1
to determine the Gibbs Free energy available to do work!
ΔG = -nFΔE, The Gibbs free energy for the given reaction is - 20859. 44
What is Gibbs free energy?
Gibbs free energy shows entropy and enthalpy of reaction.
NO2- + 6e- -> NH4+ (+0.34 volts)
O2 + 4e- -> 2H2O (+0.82 volts)
In the above equation, ΔE= 0.34 + 0.82 volts= 1.12 volts.
ΔG = -nFΔE
n= 193 moles,
F= 96.5 KJ
ΔE =1.12 volts.
ΔG = -nFΔE
= - 193 * 96.5 * 1.12
= - 20859. 44
Therefore, The Gibbs free energy for the given reaction is - 20859. 44.
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What is the name of a substance that contains a useful element which can be extracted from it
Elements are made up of atoms. Atoms cannot be broken down into simple substances.
What are elements?
Atoms are the smallest particle that cannot be broken down into simple substances. Elements are essential for life. Nitrogen, oxygen, carbon are some of the important elements in life.
Elements in human body can be classified into major elements and trace elements. Iron is an important element present in the hemoglobin. People who suffered from iron deficiency suffers from anemia.
Therefore, Elements are made up of atoms. Atoms cannot be broken down into simple substances.
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What is the difference between a compound and a molecule
Answer: A molecule is a group of two or more atoms held together by chemical bonds and a compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion
Explanation:
:0
Meiosis is cell division that creates gametes in sexually reproducing
organisms. Chromosomes are randomly assorted and are distributed
independently into four gametes. Which of the following BEST describes
the genetic material in the four gametes?
Interph
Daughter
Nuclei II
Daughter
Nuclei
(HX)
K-
Meiosis II
Melosis I
Homologous
Chromosomes
The genetic material in each gamete is exactly the same
1 point
The chromosome number of the gametes is equal to the number of chromosomes in
the parent cell
Gametes contain double the amount of chromosomes as the parent cell
Each gamete created during meiosis has a unique genetic makeup
Each gamete created during meiosis has a unique genetic makeup
Based on the chart, which will be the main focus of Dr. Factor's science lesson?
1. animals
2. habitats
3. plants
4. seasons
Animals will be the main topic of Dr. Factor's science class. The correct option is A.
What are science charts?It should be emphasized that science charts are just copies of technical data that are created by scientists based on their research and observations.
It should be noted that in the chart, that's shown, there are 3 plants, two seasons, 3 habitats which are desert, grassland, and swamp. On the other hand, it can be seen that there are 8 different types of animals that are illustrated. They include amphibians, reptiles, mammals, pisces, arachinds,. etc.
Therefore, based on the information illustrated, the main focus of Dr. Factor's science lesson will be animals.
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3) Based on your knowledge of scientific laws and theories,
which of the following is true?
A) They are hierarchical.
B) They are a hypothesis.
C) They are based on evidence and
observations.
D) They both represent definite facts that are not
subject to change
C. They are based on evidence and observations
1) In 250-300 words describe the light reactions in photosynthesis
2) In 200-250 words describe the dark reactions in photosynthesis
In light reaction it includes the use of light energy for the two molecules. The dark reaction is a light independent reaction.
Describe the light reaction in photosynthesis and also describe the dark reaction in photosynthesis?
Light Reaction:
In light reaction it includes the use of light energy for the two molecules which is needed for the next stage of photosynthesis the energy storage molecule ATP (Adenosine tri phosphate) and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts. During the light reaction the chlorophyll absorbs light energy which excites some pigments molecules to higher energy levels.
Dark reaction:
The dark reaction is also called the carbon-fixing reaction. It is a light-independent process in which sugar molecules are formed from carbon dioxide and water molecules. The dark reaction occurs in the stroma of the chloroplast, where they use the products of the light reaction.
So we can conclude that in light reaction it includes the use of light energy for the two molecules. The dark reaction is a light independent reaction.
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Scientists use the fossil record to give us information about the history of the Earth and the organisms that lived on it.
A. How does the fossil record change over time?
B. Will the fossil record ever be complete? Explain.
Question 8 of 10
A science student makes the following statement:
I think that plants grow faster in acidic soil than they do in
normal soil.
Which of these is the student doing?
A. Conducting an experiment
B. Drawing a conclusion
C. Forming a hypothesis
OD. Developing a theory
Answer:
c
Explanation:
there is no action that the student is taking, the student is just making a hypothesis
Do plants die becuase of too much sun or too much water??
Answer:
They can die from both
Explanation:
Plants need sun but too much sun can dehydrate or damage the plant. As if too water plants need air too breath so adding too much water can drown them
Answer:
Both
Explanation:
Plants harvest energy from the sun with the help of chlorophyll and carotenoid, two photon-capturing molecules. But if the plants are exposed to too much sun, these molecules absorb more energy than they can handle and generate reactive species of oxygen that can destroy the plant.
and
Roots growing in waterlogged soil may die because they cannot absorb the oxygen needed to function normally. The longer the air is cut off, the greater the root damage. The dying roots decay and cannot supply the plants with nutrients and water. Damage caused by over watering is frequently misdiagnosed as pest damage.
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8
The picture below represents what type of cell transport?
Vesicle
Extracellular fluid
Cytoplasm
A passive transport, specifically endocytosis
B passive transport, specifically exocytosis
C . active transport, specifically endocytosis
D active transport, specifically exocytosis
Answer:
Passive transport specifically exocytosis
Explanation:
Passive transport because no energy is needed exocytosis because the molecules or whatever in the vesicle leaves the cell
an object with a density of 6 g/ml is placed in a graduated cylinder with 15 ml of water. When added the water rises to 23 ml. Find the mass of the object
The mass of the object, given it has a density 6 g/mL is 48 g
What is density?
The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
How to determine the mass of the objectThe following data were obtained from the question:
Density of object = 6 g/mLVolume of water = 15 mL Volume of water + object = 23 mL Volume of object = 23 – 15 = 8 mL Mass of object =?The mass of the object can be obtained as follow:
Density = mass / volume
Cross multiply
Mass = Density × Volume
Mass of object = 6 × 8
Mass of object = 48 g
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Using your knowledge
of the human body, place the
following statements in their proper order:
Sweating & increased blood flow to the skin will release
excess heat into the surrounding environment.
The heart will pump faster to circulate oxygen required
for cellular respiration
Breathing rate will increase to expel the excessive
amount of carbon dioxide (waste) & will take in more
oxygen for working tissues
In the long term, physical conditioning and heat acclimation lead to increased perspiration during heat stress, lower skin, and core temperatures during exercise, and cutaneous blood flow needed to regulate body temperature.
There is a direct positive correlation between respiratory rate and heart rate. The faster the heart beats, the more breathing is done. When your heart beats faster, it uses more energy and delivers more oxygen to your body.
As you exhale, exhale carbon dioxide and begin a new breathing cycle. Carbon dioxide is constantly produced in the body, and by breathing, the carbon dioxide accumulated in the body is exhaled. The more activity we do, the more carbon dioxide we produce.
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what is the speed of a rocket that travels 9000 meters in 15 seconds?
According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate?
From engulfed, originally free-living bacteria
When a protoeukaryote engaged in a symbiotic relationship with a protocell by secondary endosymbiosis
From the nuclear envelope folding outward and forming mitochondrial membranes
From infoldings of the plasma membrane, coupled with mutations of genes for proteins in energy-transfer reactions
It's too short. Write at least 20 characters to explain it well.
Your answer can't be empty
The process in which a protien loses its normal configuration and is no longer able to perform its normal functions due to exposure to heat chemicals ph or radiation is called
Answer:
biochemistry & denaturation
Explanation:
Denaturation is a process in which proteins lose their shape and, therefore, their function because of changes in pH or temperature.
Renaturation in molecular biology refers to the reconstruction of a protein or nucleic acid (such as DNA) to their original form especially after denaturation
so im currently doing a project that makes up 40% of my grade, Prediction: Which of these variables do you think will have the greatest effect on the alien population? Explain.
. A: Light B: Water or C: Temp
The tempersture because of the way they need to change as the temp dose like
what describes an ion
Which is the critical step for a virus to reproduce?
how is being wrong a part of science
Answer:
Error causes results that are inaccurate or misleading and can misrepresent nature. Scientifically accepted values are scientists' current best approximations, or descriptions, of nature.
Explanation:
Error causes results that are inaccurate or misleading and can misrepresent nature. Scientifically accepted values are scientists' current best approximations, or descriptions, of nature.
Answer:
Being wrong is a part of Science because in Science you won't know everything. In Science we use hypotheses or we guess what we think will be the results. It's okay to be wrong because you can learn by experimenting and discovering new things. People make new discoveries and also scientists or people who work in the field of science aren't always correct either. It is important to be wrong sometimes because you can learn new things. Science has a whole process and it can change what you thought would be right. Being wrong in Science or learning from being wrong can be helpful because people in the future can then know the reasoning to why that is the answer. It is an essential thing honestly.
Explanation:
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PLEASE ANSWER WILL GIVE 60 POINTS!!! COMPLETE ALL SCREENSHOTS
Answer: There's an answer
Explanation: Natural connections happen in response to a variety of conditions. inherited Diversity – Within a population, there is a genetic variation that may be inherited. Competition – A fight for survival exists (species tend to produce more offspring than the environment can support).Selection – Environmental forces cause unequal reproduction within a population.